Home / 31,717.14-43,744.40-20,387.80

Finding the Fourth Proportional to 31,717.14, 43,744.40 and 20,387.80

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Solution

The fourth proportional to 31,717.14, 43,744.40 and 20,387.80 is: 28,118.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,717.14 : 43,744.40 = 20,387.80 : x
  2. Step 2: Convert to fraction form
    31,717.14/43,744.40 = 20,387.80/x
  3. Step 3: Cross multiply
    31,717.14x = 43,744.40 × 20,387.80
  4. Step 4: Simplify right side
    31,717.14x = 891,852,222.20
  5. Step 5: Solve for x
    x = 891,852,222.20/31,717.14
  6. Step 6: Final answer
    x = 28,118.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.